diff --git a/CHANGELOG.md b/CHANGELOG.md
index 9a05c8f..c4e4313 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,7 +6,7 @@ The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/),
 and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0.html).
 
 
-## Unreleased
+## 0.4.0 - 2023-08-27
 
 ### Added
 
diff --git a/lushlayers/__init__.py b/lushlayers/__init__.py
index 493f741..6a9beea 100644
--- a/lushlayers/__init__.py
+++ b/lushlayers/__init__.py
@@ -1 +1 @@
-__version__ = "0.3.0"
+__version__ = "0.4.0"
diff --git a/pyproject.toml b/pyproject.toml
index 9de82ef..9d571be 100644
--- a/pyproject.toml
+++ b/pyproject.toml
@@ -1,6 +1,6 @@
 [tool.poetry]
 name = "lushlayers"
-version = "0.3.0"
+version = "0.4.0"
 description = "Turn your keyboard into hot lasagna."
 authors = ["Matteo De Wint <matteo@mailfence.com>"]
 packages = [{ include = "lushlayers" }]
diff --git a/setup.cfg b/setup.cfg
index 31f227b..3d97734 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -1,5 +1,5 @@
 [bumpversion]
-current_version = 0.3.0
+current_version = 0.4.0
 commit = True
 message = chore: bump version to {new_version}